Fu Manchu
We’ll get together. Have a few laughs.
- Joined
- Mar 18, 2006
- Messages
- 18,314
- Reaction score
- 23,258
- Points
- 113
- Location
- WA.
- Members Ride
- VZ Crewman, VZ Cross 8, & ya mum.
With a poor seal on the cap. The surface that the cap seats into may be pitted or have minor corrosion and pitting.
A leaky water pump weeping ever so slightly. An old hose. A loose radiator hose. A previously faulty cap that pushed out coolant and drew in air.
A new cap on the system without bleeding out the air.
Also when filling a system air is introduced firstly by having it exposed to air (kind of a big one) and then the filling process both introduces air with the liquid and traps air in the system as it is filled. Like a submarine filling with water. There’s going to be air trapped in all sorts of places tucked away.
The only way to get it out is to attach a bleed bucket and run the car through two or three thermostat openings. Working the hoses with gloves on. Patience.
Or
Using a vacuum fill kit. Requires a compressor. All air is sucked out. Then it has to hold vacuum for 5mins or so. If it doesn’t, there is a leak. Somewhere. Then filling the system under vacuum takes just a minute or so and no bleeding is required.
A leaky water pump weeping ever so slightly. An old hose. A loose radiator hose. A previously faulty cap that pushed out coolant and drew in air.
A new cap on the system without bleeding out the air.
Also when filling a system air is introduced firstly by having it exposed to air (kind of a big one) and then the filling process both introduces air with the liquid and traps air in the system as it is filled. Like a submarine filling with water. There’s going to be air trapped in all sorts of places tucked away.
The only way to get it out is to attach a bleed bucket and run the car through two or three thermostat openings. Working the hoses with gloves on. Patience.
Or
Using a vacuum fill kit. Requires a compressor. All air is sucked out. Then it has to hold vacuum for 5mins or so. If it doesn’t, there is a leak. Somewhere. Then filling the system under vacuum takes just a minute or so and no bleeding is required.